Home / 129,338.28-178,487.97-71,980.02

Finding the Fourth Proportional to 129,338.28, 178,487.97 and 71,980.02

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Solution

The fourth proportional to 129,338.28, 178,487.97 and 71,980.02 is: 99,333.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,338.28 : 178,487.97 = 71,980.02 : x
  2. Step 2: Convert to fraction form
    129,338.28/178,487.97 = 71,980.02/x
  3. Step 3: Cross multiply
    129,338.28x = 178,487.97 × 71,980.02
  4. Step 4: Simplify right side
    129,338.28x = 12,847,567,650.36
  5. Step 5: Solve for x
    x = 12,847,567,650.36/129,338.28
  6. Step 6: Final answer
    x = 99,333.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.